$s^2-s-4$
$2\cdot\log\left(x-3\right)=\log\left(25\right)$
$-4\left(-x+10\right)=\frac{\left(4x+60\right)}{2}$
$8+4-6+14-12+15-49$
$l\left(a-b\:\right)=0$
$\int\left(\frac{y^2-1}{y\left(y^2+1\right)}\right)dy$
$\left(xy\right)dx+\left(2x^2+y^2\right)dy=0$
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